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USA vs EU Camshaft Compatibility - Can I swap it?

 
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j03k64  



Joined: 26 Jul 2010
Posts: 116
Location: Urbana, Ohio

PostPosted: Sun Dec 09, 2018 5:06 am    Post subject: USA vs EU Camshaft Compatibility - Can I swap it? Reply with quote

Hello!

I have a 1979 Porsche 924 N/A 2.0L (US spec) car and am having our machine shop rebuild the head. Only one cam follower needed to be replaced, but the camshaft lobe is worn / flat on exhaust port number three; rest appear to be in good condition. I can have it spray welded and put back to spec OR replace the entire cam with a new/used unit. Not a big fan of the spray weld fix.

Can I swap an EU camshaft into my USA vehicle? If so, what adjustments would need to be made?

I understand the EU cam is profiled a bit hotter than the USA version and the timing is different, which would be okay as long as the adjustment in the cam followers permits? I've already had the valves cleaned up, new guides installed at stock specs, and 1/1000 shaved from the mating surface.

If anyone has lobe specs on the USA / EU cars our machine shop would like to know/confirm that data. Keen to know the height and widths of the lobes. I've looked in the shop manual, tech sheets, searched here on the forum and couldn't find those specs clearly disclosed.

All the Best!
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1979 Porsche 924 NA (Dead, pending restoration)
1980 Porsche 924 NA (In restoration)

Sick after an industrial accident; banned from the shop for a bit. Stand by!


Last edited by j03k64 on Wed Dec 12, 2018 3:18 am; edited 1 time in total
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morghen  



Joined: 21 Jan 2005
Posts: 7976
Location: Romania

PostPosted: Sun Dec 09, 2018 6:48 am    Post subject: Reply with quote

No damage should be possible with the NA engine since the valves can never touch the pistons even with the euro high compression pistons. So id just install the camshaft.
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